* {
    padding: 0;
    margin: 0;
    list-style: none;
  }
  
  h2 {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 10px 0;
  }
  
  h2 .mask-num {
    height: 20px;
    padding: 0 5px;
    border-radius: 20px;
    background-color: #e6e6fa;
    color: #666;
    font-size: 14px;
  }
  
  body {
    background-color: #cdcdcd;
  }
  
  .container {
    width: 600px;
    margin: 0 auto;
    padding: 0 10px;
  }
  
  .header {
    height: 50px;
    background-color: #333;
  }
  
  .header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  .header .container .logo {
    width: 100px;
    line-height: 50px;
    color: #ddd;
    font-size: 24px;
    cursor: pointer;
  }
  
  .header .container .input-area {
    width: 60%;
  }
  
  .header .container .input-area input {
    width: 80%;
    height: 24px;
    text-indent: 10px;
    border-radius: 5px;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.24), 0 1px 6px rgba(0, 0, 0, 0.45) inset;
    border: none;
    outline: none;
  }
  
  .header .container .input-area button {
    width: 15%;
    height: 24px;
    vertical-align: center;
  }
  
  .mask-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 32px;
    line-height: 32px;
    margin-bottom: 10px;
    padding: 0 15px;
    border-radius: 3px;
    border-left: 5px solid #629A9C;
    background-color: #fff;
  }
  
  .mask-list.complete-list li {
    border-left-color: #999;
    opacity: .5;
  }